Invention Grant
US08497500B2 Organic EL device 有权
有机EL器件

Organic EL device
Abstract:
The object of the present invention is to provide an organic EL device having a structure that resolves a problem of trade-off between decrease in a drive voltage and increase in production yield. The organic EL device of the present invention includes a substrate, a pair of electrodes provided on the substrate, and an organic EL layer sandwiched by the pair of electrodes; the pair of electrodes includes a positive electrode and a negative electrode; the organic EL layer includes at least a light-emitting layer and a hole injection layer that is in contact with the positive electrode; the hole injection layer is formed of an n-type semiconductor host material and a p-type semiconductor guest material; a LUMO level EHIC of the host material and a HOMO level of the guest material or a valence band level EGV satisfy: |EHIC|+0.5 eV≧|EGV|>|EHIC|−0.6 eV.
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